# ConfigValidator Test Summary

## Task Completed: 3.1 - Unit Tests for ConfigValidator

### Overview
Created comprehensive unit tests for the ConfigValidator service with 44 test cases covering all major functionality.

### Test Coverage
- **Statement Coverage**: 95.21%
- **Branch Coverage**: 92.94%
- **Function Coverage**: 100%
- **Line Coverage**: 95.21%

### Test Categories

#### 1. Basic Validation (Original 26 tests)
- Required fields validation
- Property type validation
- Option value validation
- Property visibility based on displayOptions
- Node-specific validation (HTTP Request, Webhook, Database, Code)
- Security checks
- Syntax validation for JavaScript and Python
- n8n-specific patterns

#### 2. Edge Cases and Additional Coverage (18 new tests)
- Null and undefined value handling
- Nested displayOptions conditions
- Hide conditions in displayOptions
- $helpers usage validation
- External library warnings
- Crypto module usage
- API authentication warnings
- SQL performance suggestions
- Empty code handling
- Complex return patterns
- Console.log/print() warnings
- $json usage warnings
- Internal property handling
- Async/await validation

### Key Features Tested

1. **Required Field Validation**
   - Missing required properties
   - Conditional required fields based on displayOptions

2. **Type Validation**
   - String, number, boolean type checking
   - Null/undefined handling

3. **Security Validation**
   - Hardcoded credentials detection
   - SQL injection warnings
   - eval/exec usage
   - Infinite loop detection

4. **Code Node Validation**
   - JavaScript syntax checking
   - Python syntax checking
   - n8n return format validation
   - Missing return statements
   - External library usage

5. **Performance Suggestions**
   - SELECT * warnings
   - Unused property warnings
   - Common property suggestions

6. **Node-Specific Validation**
   - HTTP Request: URL validation, body requirements
   - Webhook: Response mode validation
   - Database: Query security
   - Code: Syntax and patterns

### Test Infrastructure
- Uses Vitest testing framework
- Mocks better-sqlite3 database
- Uses node factory from fixtures
- Follows established test patterns
- Comprehensive assertions for errors, warnings, and suggestions